Submission #1367956

#	Time	Username	Problem	Language	Result	Execution time	Memory
1367956		asli_bg	Stations (IOI20_stations)	C++20	Compilation error	0 ms	0 KiB

stations

#include <bits/stdc++.h>
using namespace std;

//#define int long long

#include "stations.h"

#define fi first
#define se second

#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)

#define sp <<' '<<

#define mid (l+r)/2

#define all(x) x.begin(),x.end()
#define carp(a,b) ((a%MOD)*(b%MOD))%MOD
#define topla(a,b) ((a%MOD)+(b%MOD))%MOD

#define pb push_back

#define DEBUG(x) cout<<#x sp x<<endl;
#define cont(x) for(auto el:x) cout<<el<<' ';cout<<endl;
#define contp(x) for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;

typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef vector<bool> vb;
typedef long long ll;
typedef vector<ll> vll;
typedef pair<ll,ll> pll;

const int MAXN=1e3+6;
const int INF=1e9+7;

int timer;
int tin[MAXN], tout[MAXN];
vll adj[MAXN];
vi ans;

void dfs(int nd,int ata,bool f){
    if(f){
        tin[nd]=timer++;
        ans[nd]=tin[nd];
    }
    for(auto kom:adj[nd]){
        if(kom==ata) continue;
        dfs(kom,nd,!f);
    }
    if(!f){
        tout[nd]=timer++;
        ans[nd]=tout[nd];
    }
}

vi label(int n, int k, vi u, vi v){
    ans.resize(n,0);

    FOR(i,n) adj[i].clear();

    FOR(i,n-1){
        adj[u[i]].pb(v[i]);
        adj[v[i]].pb(u[i]);
    }

    timer=1;
    dfs(0,-1,true);

    return ans;
}

int find_next_station(int s, int t, vi c){
    //c sortedmış
    bool in=true;
    for(auto el:c){
        if(s>el){
            in=false;
            break;
        }
    }

    if(in){
        //tin i kayıtlı nodesa
        int deg=c.back();
        c.pop_back();

        int once=s;
        int cur;
        for(auto el:c){
            cur=el;
            if(once<t and t<=cur){
                return el;
            }
        }

        return deg;
    }   
    else{
        //tout ı kayıtlı nodesa
        int once=s;
        int cur;
        reverse(all(c));

        int deg=c.back();
        c.pop_back();

        for(auto el:c){
            cur=el;
            if(cur<=t and t<once){
                return el;
            }
        }

        return deg;
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);

    int n;
    cin>>n;

    vi u(n), v(n);

    FOR(i,n-1){
        cin>>u[i]>>v[i];
    }

    cout<<find_next_station(3,2,{4,5})<<endl;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccYr9DLX.o: in function `main':
stub.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccUg9oiz.o:stations.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status